<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter' ]"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->

                <el-row
                  :class="[i2 === 0 ? '':'bdtop','vcenter']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3,i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre></pre>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close='setRightDIalogClosed'>
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
       :default-checked-keys="defKeys"
       ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="alloRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限数据
      rightslist: [],
      //树形控件数据
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点id值数组
      defKeys:[],
      //当前即将分配权限的 角色id
     roleId:'' 

    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
      // console.log(this.rolelist)
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败！')
      } else {
        //  直接查询此方法，导致数据重新赋值，因为数组被重新赋值，页面会刷新不好
        //  this.getRolesList()

        //直接将返回的数据重新给了数组，但是没有全部赋值，这样不会发生页面刷新
        role.children = res.data
      }
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败')
      }
      //获取的权限数据保存到data中
      this.rightslist = res.data

      // 递归形式获取当前节点id
      this.getLeafKeys(role,this.defKeys)

      this.setRightDialogVisible = true
    },
    //通过递归的形式获取角色的所有三级权限id
    getLeafKeys(node,arr){
      if(!node.children){
        //如果当前node节点不包含chindren属性就是三级节点
        return arr.push(node.id)
      }

      node.children.forEach(item=>{
        this.getLeafKeys(item,arr)
      })
    },
    //监听分配权限对话框的关闭事件
    setRightDIalogClosed(){
      this.defKeys=[]
    },
    //点击为角色分配权限
    async alloRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')

     const {data:res} =  await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
     if (res.meta.status !== 200) {
       return this.$message.error('分配权限失败！')
     }else{
       this.$message.success('分配权限成功')
       this.getRolesList()
       this.setRightDialogVisible = false
     }
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>